/Engine/Source/Runtime/Engine/Public/CollisionQueryParams.h
Special variant that hints that we are likely adding a duplicate of the root component or first ignored component. Helps avoid invalidating the potential uniquess of the IgnoreComponents array.
void AddIgnoredComponent_LikelyDuplicatedRoot ( const [UPrimitiveComponent](API\Runtime\Engine\Components\UPrimitiveComponent) * InIgnoreComponent )